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Turbo help please

Turbo help please

Postby Domeniccurulla [OP] » Oct 01 2019, 6:54pm

I have a 2006 duramax that is having power loss issues. My readout screen says I am getting either 0 or 1 boost even at full throttle. When I give any throttle more than slight black smoke starts to where it looks like I have a fuel dump switch on my tuner (which I do not). How and what do I need to test?
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Re: Turbo help please

Postby 19trax95 » Oct 01 2019, 7:04pm

To me that sounds like a boost pressure sensor failure or a wiring issue.

For a turbo to just stop making boost all together without something catastrophic happening is unlikely.

Unless its totally seized up, which is possible. But I'd start with looking more into the sensor. Of course I'd pull the tube off and verify the turbo is indeed intact and doesnt have a huge amount of end play.
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Re: Turbo help please

Postby puppeteer » Oct 07 2019, 2:04am

Do you hear the turbo spool up? That would be the first indication that the turbo is done. If you hear it then there is another issue. Like mentioned pull the turbo mouth piece, look for obvious damage to the compressor wheel, Then wiggle the compressor wheel around not hard. It should have little to no play. if the blades touch the housing then the bearings are shot. Also the veins may be sticking. Would be a good idea to get it on a tech two and see if they cant manually move the veins open and closed.
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Re: Turbo help please

Postby Domeniccurulla [OP] » Oct 23 2019, 12:17am

The boot slipped off! All fixed
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Firing on 2 cylinders [L1]
Firing on 2 cylinders [L1]
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Make/Model: GMC Sierra
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